Spike point



April 30, 1929. A, .LAUFER 1,711,393

SPIKE POINT Filed Feb.' 28, 1928 Patented Apr. 30,1929.

PATENT OFFICE.

AUGUST LKUFER, OF VIENNA, AUSTRIA.

SPIKE POINT.

Application filed February 28, 1928, Serial No. 257,729, and in Austria November 30, 1926.

This invention relates to driven fastenings and has a special reference to a novel form of point for spikes, nails and the like.

The principal object of the invention is to I provide an improved form of point for bifurcated nails, spikes and the like.

With the above and other objects in view as will be hereinafter apparent, the inven' tion consists in generalof certain novel details of construction and combinations of parts hereinafter fully described, illustrated in the accompanying drawings and specifically claimed.

In the accompanying drawings like characters of reference indicate like parts in the several views, and: v 5

Figure 1 is a side view showing the beveled arrangement of the split point parts of the device.

Figure 2 is a considerably enlarged view of the lower portion of Figure 1.

In the form of the invention here shown it consists of a tapered pin or spike a split at its smaller or point end to provide two prongs b and c, beveledat their end edges inwardly as shown at d. These beveled edges d are inclined at opposite directions as shown at e andv In use the spike is driven in the ordinary manner, the bevel ends of the bifurcated 3o portion Causing these parts to curve out wardly and thus lock firmly in the material in which the spike is driven.

There has thus been provided a simple and efficient device of the kind described and for the purpose specified.

Having thus described the invention, what is claimed as new, is:

A device of the kind described consisting of a shank, bifurcated at one end to form 40 prongs, the free ends of which are divergently beveled from their opposed inner faces to their respective outer faces to form chisel like cutting edges, said cutting edges extending throughout the width of the 4-5 prongs and being oppositely inclined longitudinallv of the shank, the beveled portions having plane surfaces.

In testimony whereof I affix my signature.

DR. ING. AUGUST LAUFER. 

